首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Glass is everywhere in our lives. It is so common 【21】______ we hardly think about it. We 【22】______ it when we look out of th
Glass is everywhere in our lives. It is so common 【21】______ we hardly think about it. We 【22】______ it when we look out of th
admin
2010-06-30
21
问题
Glass is everywhere in our lives. It is so common 【21】______ we hardly think about it. We 【22】______ it when we look out of the window and if we wear glasses. We drink from it and sometimes eat from it. The light in our homes comes through glass windows in the daytime and from glass lights 【23】______ . Glass 【24】______ in homes, schools, businesses, industry, and automobiles.
Fortunately for us, glass is 【25】______ very inexpensive materials. The main material is sand from quartz rock. The mixture is heated until it becomes a syrupy 【26】______ . When the liquid cools, it becomes glass.
No one knows 【27】______ first discovered glass or how. Early humans used obsidian, a natural glass 【28】______ by volcanoes, to make tools and jewelry. People probably began making glass themselves around 3000 B.C. in Syria. Then in a war 【29】______ Egypt and Syria in 1400 B. C., Syria became part of Egypt. The Egyptians took Syrian glassmakers 【30】______ to Egypt, and over the centuries the entire eastern Mediterranean area became a glassmaking center.
Probably around 300 B.C. the blowpipe 【31】______ . Egyptian glassmakers developed the use of the blowpipe. They specialized 【32】______ beautiful jewelry, dishes, and other containers.
The Romans soon started making their own glass. Then they 【33】______ that glass could be used to make windows. 【34】______ centuries later, Europeans made magnificent church windows 【35】______ colored glass.
【36】______ 1900 companies have developed many new types of glass. Safety glass is a sandwich of glass and plastic. If it breaks, the pieces stay together 【37】______ flying in all directions. This invention is very useful 【38】______ automobile windows.
Today most glass is made 【39】______ machines in large factories. No one 【40】______ it. People use television and computers to control the machines.
【32】
选项
A、in
B、on
C、for
D、from
答案
A
解析
本句意为:他们专门研究(用玻璃制成)漂亮的珠宝、盘子和其他的容器。specialize in为固定搭配,意为“专门研究,专门从事”。
转载请注明原文地址:https://kaotiyun.com/show/JGJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
WhenDonaldOlayerenrolledinnursingschoolnineyearsago,hisfathertookithard."Here’smyfather,asteelworker,hearing
WhenDonaldOlayerenrolledinnursingschoolnineyearsago,hisfathertookithard."Here’smyfather,asteelworker,hearing
What’stheaverageincreaseperyearofforeignstudentpopulationintheperiodbetween1985and1990intermsofpercentage?
PaoloFril,chairmanandscientificofficerofGeneDupe,basedinSanMelito,California,isamanwithadream.Thedreamisa
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Youwillreadaquestionwhichsays,"Whichisabettersourceofnews—newspaperor7V?"Writeanarticleforthenewspapertoc
Foreignstudent(s)population.
Hawaii,theneweststateintheUnitedStates,isa【C1】______ofeightlargeislandsandmanysmall【C2】______intheCentral
Hawaii,theneweststateintheUnitedStates,isa【C1】______ofeightlargeislandsandmanysmall【C2】______intheCentral
随机试题
吸收操作过程中,在塔的负荷范围内,当混合气处理量增大时,为保持回收率不变,可采取的措施有()。
已知某厂生产x件产品的成本函数为C(x)=2500+200x+x2(元),要使平均成本最低,则所生产的产品件数为().
CT探测器的作用是
每日所需水分是( )该婴儿每天需8%.糖牛奶量及另需补充的水分为8%.糖牛奶(ml)另补水分(ml)( )
公司提取法定公益金的用途是()。
平行登记是指对于每项经济业务应以会计凭证为依据,既要记入有关总分类账户,又要记入其所属的明细分类账户。()
根据《项目融资业务指引》,贷款人可以根据需要,将()为贷款设定质押担保。
素质教育的终极目标是()
复发性口腔溃疡较少发生的部位是()。
宽带城域网的网络平台的层次结构可分为()、()和()3个。
最新回复
(
0
)